1) 15x(1+1/3 - 1/5) = 15x(1 + 3/15 - 1/5) = 15x(15/15 + 3/15 - 3/15) = 15x(15 + 3 - 3)/15 = 15x15/15 = 15
2) 48x(19/24 - 7/12 + 3/8) = 48x(2/3 - 1/2 + 3/8) = 48x(16/24 - 12/24 + 9/24) = 48x13/24 = 26
3) 7/9x(6/7 - 9/14) = 7/9x(12/14 - 9/14) = 7/9x3/14 = 1/6
4) (15/16 - 5/12 + 2.5)x4/5 = (45/48 - 20/48 + 24/10)x4/5 = (25/48 + 24/10)x4/5 = (625/1200 + 288/1200)x4/5 = 913/1200 x 4/5 = 913/1500 = 0.6087
1) 15x(1+1/3 - 1/5) = 15x(1 + 3/15 - 1/5) = 15x(15/15 + 3/15 - 3/15) = 15x(15 + 3 - 3)/15 = 15x15/15 = 15
2) 48x(19/24 - 7/12 + 3/8) = 48x(2/3 - 1/2 + 3/8) = 48x(16/24 - 12/24 + 9/24) = 48x13/24 = 26
3) 7/9x(6/7 - 9/14) = 7/9x(12/14 - 9/14) = 7/9x3/14 = 1/6
4) (15/16 - 5/12 + 2.5)x4/5 = (45/48 - 20/48 + 24/10)x4/5 = (25/48 + 24/10)x4/5 = (625/1200 + 288/1200)x4/5 = 913/1200 x 4/5 = 913/1500 = 0.6087